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#ifndef EVENTFILTER_HPP__
#define EVENTFILTER_HPP__
#include <functional>
#include <QEvent>
#include <QKeyEvent>
#include <QMouseEvent>
#include <QObject>
namespace EventFilter
{
class FocusOut final : public QObject
{
public:
using Filter = std::function<void()>;
FocusOut(Filter filter,
QObject * parent = nullptr)
: QObject {parent}
, filter_ {filter}
{}
bool
eventFilter(QObject *,
QEvent * event) override
{
if (event->type() == QEvent::FocusOut) filter_();
return false;
}
private:
Filter filter_;
};
class EscapeKeyPress final : public QObject
{
public:
using Filter = std::function<bool(QKeyEvent *)>;
EscapeKeyPress(Filter filter,
QObject * parent = nullptr)
: QObject {parent}
, filter_ {filter}
{}
bool eventFilter(QObject *,
QEvent * event) override
{
if (event->type() == QEvent::KeyPress)
{
if (auto const keyEvent = static_cast<QKeyEvent *>(event);
keyEvent->key() == Qt::Key_Escape)
{
return filter_(keyEvent);
}
}
return false;
}
private:
Filter filter_;
};
class EnterKeyPress final : public QObject
{
public:
using Filter = std::function<bool(QKeyEvent *)>;
EnterKeyPress(Filter filter,
QObject * parent = nullptr)
: QObject {parent}
, filter_ {filter}
{}
bool eventFilter(QObject *,
QEvent * const event) override
{
if (event->type() == QEvent::KeyPress)
{
if (auto const keyEvent = static_cast<QKeyEvent *>(event);
keyEvent->key() == Qt::Key_Enter ||
keyEvent->key() == Qt::Key_Return)
{
return filter_(keyEvent);
}
}
return false;
}
private:
Filter filter_;
};
class MouseButtonPress final : public QObject
{
public:
using Filter = std::function<bool(QMouseEvent *)>;
MouseButtonPress(Filter filter,
QObject * parent = nullptr)
: QObject {parent}
, filter_ {filter}
{}
bool eventFilter(QObject *,
QEvent * event) override
{
if (event->type() == QEvent::MouseButtonPress)
{
return filter_(static_cast<QMouseEvent *>(event));
}
return false;
}
private:
Filter filter_;
};
class MouseButtonDblClick final : public QObject
{
public:
using Filter = std::function<bool(QMouseEvent *)>;
MouseButtonDblClick(Filter filter,
QObject * parent = nullptr)
: QObject {parent}
, filter_ {filter}
{}
bool eventFilter(QObject *,
QEvent * event) override
{
if (event->type() == QEvent::MouseButtonDblClick)
{
return filter_(static_cast<QMouseEvent *>(event));
}
return false;
}
private:
Filter filter_;
};
}
#endif
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